Permutation lock



J. MARKUS AND L. THOMAS. PEBMHUTATION LOCK. l APPLICATION FILED NOV-3|1920.. RENEWED APR. l2, i922. 1,420, 723, Patented June 27,1922.`

2 SHEETS-SHEET Lf' F IG. 1 L

.|. 'MARKUS AND L. THOMAS.

' PERMuTATloN LocK. APPLICATION FILED NQV. i. i920. RENEWED APR. I2.1922. 1,420,723. Patented June 27, 1922.

I NV EN TOR 2 TORNEY.

JoSo MARK-Us lAND Louis THOMAS, or EAST rirrsnpneir, PENNSYLVANIA. l

:PERMUTATION Loox;

' Specificationof Letters Patent. Patentedv *June*y 27, 1922;

Application led November 3,' 1920, SerialNo. 421,500. Renewed April 12,1922. Serial No. 551,841.

Vhinger member is locked to a body section.v g

`A further robject ofthe invention resides in the provision of apermutation lock embodying a pluralityfrof rotatable permuta'- tiondisks adapted to be rotated to certain positions to permit the slidingmovement of a notched boltthat is resiliently connected to"'a keeperhook for engaging a latch member.' l v With the above and other` objectsin view,

Y the invention consists in the novel form,

combination and arrangement of parts herelinafter more fully describedin connection with the `accompanying drawings, and in which likereference characters indicate similar parts throughout the'severalviews.

In the drawin s,

Figure 1 is a ront' elevational Iview of a permutation lock constructed,in accordance with the present invention, a portion of a bodyStructure'and hinged cover-being illustrated. f

Figure 2 iS aA rear elevational view ofthev lock structure with the rearwall of the permutation lock mechanismV casing removed, the keeper hookand latch bolt being connected, Y

Figure 3 is a rear elevational view of the lock casing containing thelatch bolt, the latch bolt shown by dotted lines in retracted position,

vFigure 4 1S a rear elevational view, with' the rear wall removed of thepermutation mechanism casing vshowing the latch keeper retracted toVinoperative position', v

Figure 5 is atop plan view Vof the latch bolt casing and a portion ofthe supporting structure, i

Figure `6 vis a topplan view of the permutation lock mechanism'casingwith a portion of the supporting structure,

Figure 7 isa horizontal Sectional view taken on `lineVVII--VII ofFigure2,

Figure 8 is a perspective view of the latch i keeper removed from theeasing,

Figure 9 is a perspective view ofthe re-' leasable member of thepermutation lock mechanism, and

Figure 10 isa cross Sectional view through one of the permutation disksand the spindle of the latch keeper operating member.

Referring more in detail to the accom#y Janyingdrawings, there iSillustrated 'a lock 1 or a receptacle, the receptacle embodying a bodyportion 1 and a hingedcoverl 2, a permutation -lock enclosing casing 3being secured as at 4 tothe body portion lwhile a latch bolt'enclosingcasing 5 is secured to the cover 2 as` at .6l 1

The casing 3 containing the permutation; lock mechanism is preferably.rectangular in plan and has mounted therein a transverse partition7-asshown`in Figures 2 andfl di; vidingthe casing into compartments 8and 49. Alatch keeper operating member 'ofthe is mounted withinthe-casing3V and comprises a spindlel 10 having alined spacedlugs 11extending longitudinally -A thereof, the spindle being slidably mountedin 'the partition 7 and'eiitending into the compartment form bestillustrated in' Figures k2, 4;, and 9 9 while the enlargedk head 12thereof lies;

within the compartment 8 andengages the adjacent face of the partition.

' The frontA wall of the cas1ng'3 1s provided `with an outwardly'curvedsection 13 accommodating the curvedv abutments 14: lon the spindle head12 while the front'wall ofthe casing 3 in line with the curvedfportion13 is .provided with a longitudinal opening 15 providinga clearance fortherotatable permutation disks 16 mountedr upon thespindle i 10 betweenthe partition Zand the lend wall of the casing including theVAcompartment 9.

The permutationA disks areof the form best y illustrated in Figures 2and v10, the same being channel-shaped in crosssection defining oppositewalls 17 provided with 'central 'openings received on the'spindle l10with the inner walls of the openings -notched as Vat 18 for registrywith the lugs l1 toy permit-sliding movement of the spindle 10.` Whenthe permutation disks 'are rotated'to displace the notches from'registry with the lugs 11, the side walls 17 of the permutation membersextend into the spaces between adjacent lugs to cooperate therewith inholding the v spindle against sliding movement. To effect slidingmovement of the spindle 10 and head 12 carried thereby, a pin 19 carriedby the head adjacent the abutment 14 extends through a slot 2O in thefront wall of the casing 3 and carries upon the projecting end thereof,a finger piece 21. A rearwardly directed arm 22 is carried by thespindle head 12 and extends through an accommodating opening in thepartition 7 and is provided upon its lower face with a hook 23 forpurposes presently to appear.

A sliding latch keeper of the form best illustrated in Figures 2, 4, and8 embodies a shank 24 having a lower offset portion 25 with anoverhanging keeper hook 26 and an end extension 27, a lug 28 projectinglaterally from the end of the offset portion 25 for engagement with thehook 2,3. upon the arm 22.' The shank 24 of the latch keeper is slidablymounted in a bracket 29 depending from the upper wall of the casing 3while the end extension 27 projects through the upper end of thepartition 7 and is engaged by the leaf spring 30 normally to hold thelatch keeper 24 and the spindle 10 forwardly projected into thecompartment 9 of the lock casing. To assist the flat spring 30, a coilspring 31`is secured to a pin 32 carried by the upper wall of the casing3 with the end-thereof secured in the opening 24 of the latch keepershank 24, both springs 30 and 31 tending to move the latch keeper withinthe compartment 9.

The latch bolt contained within the casing 5 upon the cover section 2embodies a spindle 33 carrying a latch head 34 upon its lower end withthe upper end 33 thereof projecting from the upper wall of the casing 5.A pair of brackets 35 carried by one wall of the casing 5- providessliding guides for pins 36 secured to the ends of a cross arm 37` uponthe spindle 33, while a coil spring V38 surrounds the lower end of thespindle between the cross arm 37 and the bottom wall of the casing 5.The head'34 of the latch rod projects into the opening 39 of the upperwall of the casing 3 while the pins 36 are received into openings 40 insaid casing wall to hold the latch bolt -correctly positioned within thecasing 3 and to prevent relative rotary movement of the two casings. l

. In the operation of the device, .assuming that the lock casings areconnected as shown in Figure 2, and it being desired to release the hook2 6 from engagement with the head 34 of the latch rod 33, thepermutation disks 16 are rotated to position the notches 18 in the walls17 thereof for rigistry with the lugs 11 upon the spindle 10, at whichtime the finger piece 21 carried by the spindle head 12 may be shiftedin the casing slot 20 to move the spindle and head and carry therewiththe sliding latch keeper 24 by reason of the hook connection 23 of thehead with the lug 28 upon the latch keeper.

This movement will be in opposition to the springs 30 and 31 and willdisplace the hook 26 from engagement with the latch head 34 whereuponthe spring 38 will elevate the latch bolt and t-hepi'ns 36 carriedthereby to disconnect the lock sections as shown in Figure 3. Upon therelease of pressure on the finger piece 21, the springs 30l and. 31 willreturn the sliding latch keeper, spindle 10 and head l2 carried therebyto the position shown in Figure 2 to present the hook 26 for engagementwith the head 34 of the latch bolt. To lock the sections to.- gether,the projecting end 33 of 'the lat/ch rod is pressed downwardly Vagainstthe. tension of theV spring 38 to project the latch head 34 into thecasingV opening 39y andthe engaging beveled faces of the hook 36 andlatch head34 will cause the sliding latch keeper to move against thetension of the springs 30 and 31 for the complete insertion of the latchhead 34 and when said hook and head are moved beyond the engagingpositions of their beveled faces, the springs will return the slidinglatchA keeper to the position shown in Figure 2 for engagement with thehead 34 of the latch rod. It will therefore be seen that it is necessaryto operate the permutation ydisks in order to effect a positive slidingmovement of the latch keeper 24 while the locking engagement between thelatch bolt 33 and latch keeper 24 i is automatic in view of theresilient sliding mounting of the latch keeper.

While there is herein shown and described what is believed to be thepreferred embodiment of the invention, it is nevertheless to beunderstood that minor changes may be made therein without departing fromthe spirit and scope of the invention as claimed.

That is claimed as new is:

1. A permutation lock of the type Vdescribed comprising a. casing, apartition therein, a spindle provided with spaced lugs slidablyextending through said partition, a plurality of permutation disksassociated with the spindle lugs to control sliding movement of thespindle, a head carried by the spindle at the side of the partitionopposite to the permutation disks, a sliding latch keeper mounted withinthe casing, a spring associated with each end of the latch keeper forholding the same normally projected in one direction, a keeper hookcarried by the latch keeper, a lateral lug carried by the sliding latchkeeper, a head carried by the spindle, a hooked arm carried by said headand in engagement with the lug on the latch keeper and a latch boltassociated with the hook of the latch keeper.

2. A permutation lock of the type described comprising a casing, apartition therein, a spindle provided with spaced lugs slidablyextending through said partition, a

plurality of permutation disks associatedv with the spindle lugs tocontrol sliding movement of the spindle, a head carried by the spindleat the side of the partition `opposite to the permutation disks, asliding latch keeper mounted Within the casing, a spring associated Witheach end of the latch keeper for holding the same normally projected inone direction, a keeper hook carried by the latch keeper, a lateral lugcarried b the sliding latch keeper, a head carrie by the spindle, ahooked arm carried by said .head and in engagement with the lug on thelatch keeper, a latch bolt casing, a tensioned latch bolt'therein, guidepins carried by said bolt, the first named casing having openings in theupper Wall thereof to receive the latch bolt and pins With the latchbolt in engagement With the latch keeper.

In testimony whereof We alix our signatures.

J OSO MARKUS. LOUIS THOMAS.

